An interactive music theory tool that visualizes key relationships, chord progressions, guitar chord diagrams, and piano keyboard layouts simultaneously.
Built in vanilla HTML5. No dependencies. Works in any browser.
- Select any key on the chromatic wheel
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- Choose chord degrees using Roman numerals (I through VII)
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- See guitar chord diagrams and piano keyboard update in real time
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Color coding shows each note's relationship to the root
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Nashville Number System is how professional musicians communicate chord progressions quickly across any key. This tool makes that system visual and immediate for learners at any level.
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MIT
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